Copper Alloy C64800-O60 vs C64800-TH04
Copper Alloy · C64800 temper comparison
C64800-O60 and C64800-TH04 are two conditions of the same copper alloy grade, C64800: O60 (soft annealed) versus TH04 (TD04 and precipitation hardened). The chemistry is identical, so every difference below comes from the condition. C64800-TH04 is the stronger of the two: yield strength 720 MPa (104 ksi) against 140 MPa (20.3 ksi) for C64800-O60, about 5.1 times as much; tensile strength follows at 790 MPa (115 ksi) vs 380 MPa (55.1 ksi). In exchange, C64800-O60 is the more ductile: elongation 40% versus 5% for C64800-TH04, and C64800-TH04 is harder (240 HV vs 85 HV). C64800-O60 runs hotter in service (250°C vs 200°C continuous) and C64800-TH04 conducts heat better (170 W/m·K vs 120 W/m·K). On the shop floor, C64800-O60 welds better (very good vs fair).
C64800-O60Choose it when the part is bent, formed or impact-loaded, or when the part sees heat.
C64800-TH04Choose it when strength drives the design.
C64800-O60 vs C64800-TH04: propertiesHow to read these bars
- One bar per material. A full bar is the highest value among all copper alloy grades in the FabDigit library; each bar is drawn as a share of that.
- The better value (by the usual engineering direction) is in bold. Rows with no direction — density, thermal conductivity — have no bold.
- Values are typical room-temperature figures for the condition named on each card.
- Confirm against the certified mill or resin datasheet before design release.
How to read these bars
- One bar per material. A full bar is the highest value among all copper alloy grades in the FabDigit library; each bar is drawn as a share of that.
- The better value (by the usual engineering direction) is in bold. Rows with no direction — density, thermal conductivity — have no bold.
- Values are typical room-temperature figures for the condition named on each card.
- Confirm against the certified mill or resin datasheet before design release.
Mechanical
Strength, stiffness, ductility and hardness at room temperature.
Elastic (Young's) Modulus
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Shear Strength
Fatigue Strength (Endurance Limit)
Hardness, Rockwell B
Hardness, Vickers
Same in both: Shear Modulus 48 GPa7 Msi · Bulk Modulus 120 GPa17.4 Msi · Poisson's Ratio 0.34
Physical
Density and transition temperatures.
Same in both: Density 8.8 g/cm³0.32 lb/in³ · Melting Point (Solidus) 1,030°C1,886 °F · Liquidus Temperature 1,075°C1,967 °F
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Max Service Temperature (continuous)
Same in both: Specific Heat Capacity 380 J/kg·K0.09 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 17.5 µm/m·K9.7 µin/in·°F · Latent Heat of Fusion 205 J/g88.1 BTU/lb · Min Service Temperature -196°C-321 °F
Electrical
Conductivity and insulation.
Electrical Conductivity
Electrical Resistivity
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.25 V · Corrosion Resistance 70 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Machinability Rating (AISI 1212 = 100 %)
Weldability
Formability (cold)
Same in both: Brazeability / Solderability 75 / 100 · Polishability 80 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 58 MJ/kg24,936 BTU/lb · Embodied Carbon (primary production) 3.8 kg CO₂/kg · Embodied Water 250 L/kg30 gal/lb · Typical Recycled Content 30%
Strength versus weight
Yield strength against density for every copper alloy grade in the FabDigit library; the compared grades are highlighted. Up and left is stronger for its weight.
C64800-O60 vs C64800-TH04 — frequently asked
Is C64800-TH04 stronger than C64800-O60?
Yes. C64800-TH04 has a typical yield strength of 720 MPa (104 ksi) against 140 MPa (20.3 ksi) for C64800-O60 — about 5.1 times as much. Tensile strength is 790 MPa (115 ksi) vs 380 MPa (55.1 ksi).
Which condition does FabDigit quote by default, O60 or TH04?
TF00 is the default C64800 condition in the FabDigit quote flow (neither O60 nor TH04). The other condition is available on request or by drawing note — specify it in the material field or the part notes and the quote is priced for it.
Which is easier to machine, C64800-O60 or C64800-TH04?
C64800-TH04. Its machinability rates fair (38/100) against poor (30/100) for C64800-O60; for welding the order is C64800-O60 first (very good, 70/100) then C64800-TH04 (fair, 50/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in C64800-O60 and C64800-TH04 side by side — material, machining time, tolerance and finish in one quote. Certified material data ships with the order on request.
Typical handbook values for the conditions named above, normalised for comparison. Hardness on non-Brinell scales is converted approximately for charting only. Request certified data with your order for design-critical properties.